Thanks for the replies, but I’m finding the information here very sketchy. Even though it has not been stated directly, it appears that the Surf Soho comes with a large list of blacklisted web sites, which is stored in internal memory. That feature must be accessed by ADVANCED/CONTENT BLOCKING/Web Blocking preconfigured categories.
If so, after a few years, that internal list is going to be outdated and no longer valid. I completely do understand that I can manually add undesirable web sites into the Surf Soho. This operation is covered in the manual very well. However the manual is silent about the pre-configured block lists and does not mention anything about the use of the feature; STATUS/Content Filtering Database/ Download. My goal is to understand what each piece of equipment in my network chain is doing.